23878361640997 has 2 divisors, whose sum is σ = 23878361640998. Its totient is φ = 23878361640996.

The previous prime is 23878361640961. The next prime is 23878361641009. The reversal of 23878361640997 is 79904616387832.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23876181778276 + 2179862721 = 4886326^2 + 46689^2 .

It is a cyclic number.

It is not a de Polignac number, because 23878361640997 - 2⁷ = 23878361640869 is a prime.

It is a super-2 number, since 2×23878361640997² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23878361640697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11939180820498 + 11939180820499.

It is an arithmetic number, because the mean of its divisors is an integer number (11939180820499).

Almost surely, 2^{23878361640997} is an apocalyptic number.

It is an amenable number.

23878361640997 is a deficient number, since it is larger than the sum of its proper divisors (1).

23878361640997 is an equidigital number, since it uses as much as digits as its factorization.

23878361640997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 658409472, while the sum is 73.

The spelling of 23878361640997 in words is "twenty-three trillion, eight hundred seventy-eight billion, three hundred sixty-one million, six hundred forty thousand, nine hundred ninety-seven".